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Alsworld
| | Posted on Tuesday, April 02, 2002 - 4:45 pm: | 
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Okay folks,
I am taking the ultimate TVI challenge and am looking for help in kicking it's butt! I bleed on a neighbors electronics (really stuff that high pass filters would cure probably) but this is my opportunity to get all the stuff I originally wanted anyway so looking for your ideas.
I am going to invest in the highest quality coax just this side of hardline. It must be double shielded to appease myself. I have found Belden 9913, 9913F7 (flexible) and 9096 IIA coax to fit in line with what I want. The 9096 IIA is a top of the line 9913 type flexible coax with even less loss (or so it claims) than Belden. I'm thinking about even making jumpers with it. RG 213 is cheaper but I want the double shield stuff. Belden actually cost a little more.
Next is a high quality Low-pass filter. Which one is really best?
Being we are spending cash, would the GPK for the IMAX 2000 do anything to help with TVI? Yeah I know that one is reaching but it came out on Copper right after I ordered my antenna. My basic theory is to narrow the signal away from my neighbors house.
Gonna work on the grounding issue but will have to relocate my equipment to reach a grounding rod.
I'm even contemplating the T-4+ and T-4G RFI suppressors from www.radioworks.com. Anyone ever experimented with those?
I really only bleed when running extra power and would like to do so occasionally. Currently running barefoot. It's strange, I've been a DXing fool on LSB talking to Canada, Arizona, California and a few other states running barefoot, radio turned down to 4 watt output and the power mic down low. For the life of me I can't figure why I'm willing to spend a few hundred bucks to run a $99 amp? In order to somehow preserve a reputation as not being completely stuuuupid  , lets just call it my challenge against the evil TVI monster.
I would appreciate success stories or advise being I really do believe it can be beat. |
Taz
| | Posted on Tuesday, April 02, 2002 - 11:53 pm: |
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Good coax, like you were talking. ground the chassis of your equipment, have the phone company and cable company install filters on your neighbors stuff.
TAKE YOUR GROUND OFF OF THE WATER PIPES!!!!!!! HIS ELECTRIC IS GROUNDED TO WATER PIPES AND SO IS YOURS, A PERFECT TVI CONDUCTOR!!!
NO ROCK SALT!!!!
IT WILL EAT THOSE GROUND RODS UP!!!!!
NO GROUND RODS OVER 8FT!!
USE A DRAKE LOW PASS FILTER FOR YOU. DRAKE MAKES THE BEST LOW PASS FILTERS!!!
GET HIM A HIGH PASS FILTER FOR HIS T.V.!!
Ground what you can of their stuff.
TRY THE GROUND PLANE KIT, IT CANT HURT YOU, AND GIVES YOU BETTER OUTPUT AND RECEIVE!
ANY QUEATIONS?
TAZ-CB@COX.NET |
bruce
| | Posted on Wednesday, April 03, 2002 - 7:33 am: |
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Ok lets get started
Getting your main signal lobe away from the house is a wise move...good coax... the gpk also should help Now do you come through your own stuff?? if not lets go through what he has and the easyest ways to isolate the problem
1) tv set if your killing all channels try the high pass first if one channel hummm .... ch 2 is 2 har. ch 5 is 3 har. off amp filter the amp.
2) telephone... today they have a bunch of electronics check around and see if you can find some beads or rob some out of a switching supply from a old computer 99% its comming in the wire.
3) audio / vcr's tough one i know this one made me and the jurk next door go to court thoes things have no shelding at all put beads on all inputs to vidio / audio and on speaker leads.
good sourse of RF beads
www.palomar-engineers.com
if all else fails document all you have done you want to show a efford.... CYA ......
bruce |
Alsworld
| | Posted on Wednesday, April 03, 2002 - 9:59 am: |
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Taz,
thanks. Drake filter aye. Sure enough my equipment is grounded to water pipes only because of location. I'm gonna move it so I can reach an actual grounding rod. I've got a nice piece of copper pipe with clamps to set up grounds from each piece of equipment to the rod once I move it all. As for his equipment, I don't come accross his televisions (cable) but he was not real clear on what "video thing" he has in the kitchen. Also his computer speakers. I've done some research and could just tell him his stuff isn't filtered enough but in the spirit of being neighborly, plus being it happens running power on CB, I will really put forth the effort. It's the right thing to do. I bleed on my own televisions in the house also (all antennas, some are amplified) running barefoot! so it already drives the wife and kids crazy so I know if I can eliminate that, success is mine. Amplified antenna's I know suck in the RF but like I said, it's the challenge now! It does not affect whatsoever my sattelite dish. No telephones are affected be it his or mine. The GPK?? it's just my excuse to get one. Sure would like to see that Product Review once it's done. Yes I have used salt in the grounding rod holes. I live 300 yds from the intercoastal and my yard is all sand. I will move my antenna once I find a better and suitable solution that's farther away from his house and I'll put the rods in without salt. All my grounding rods are 5/8", 8' solid copper. I'll probably get another one just for good measure. Installing and removing them is far too easy in this sand.
It has taken me a few months to get where I'm at, still learning a lot, and will have to redo a few things along the way but if I can stop the bleeding into my own house (with amplified antenna's) by doing it right, maybe I can help others with the same problem. I don't seem to bother him barefoot so it's peacefull. He was not the nicest person when he complained but I can understand his point and was very nice to him anyway. I gave him my name and number in case he received any interference and thanked him for letting me know about the problem. He was not expecting me to be so helpful and willing to fix the problem so at least we're off to a good start.
Bruce, got the e-mail and will respond soon. |
Alsworld
| | Posted on Wednesday, April 03, 2002 - 3:58 pm: |
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Bruce, check your e-mail. Also I saw a post on here from a while back where you refered to hang four wires 99" long from the base of the antenna to "decouple" it. Can you explain or is that not applicable here? |
Taz
| | Posted on Wednesday, April 03, 2002 - 6:25 pm: |
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DONT USE SALT!!! IT EATS YOUR GROUND AND THEN YOU DONT HAVE ONE~!!!!!
ROCK SALT RUINS COPPER AND ONLY TAKES 20 MINUNITES TO DO SO!!!!!
ONE POINT, NO GROUND WIRES OR RODS OVER 8 FEET.
THEY WILL RADIATE.
HAVE THE CABLE COMPANY INSTALL FILTERS ON HIS COAX FOR THE "VIDEO" THING. |
bruce
| | Posted on Wednesday, April 03, 2002 - 6:41 pm: |
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ok all your grk is is a decoupling kit cut 4 wires about 99 inches hang them from the feedpoint on your antenna back down the mounting pipe they must not make a connection EXCEPT at the feed point ( at the bottem of the ant where you hook your coax) what they will do is make the mounting pipe go away rf wise and not radate along with the antenna or what is called decoupled from the antenna. As for audio devices you got to stop RF at ALL inputs AND the speakers too even on the computer the speakers will pick up rf Ok ill stop here lets kick this around both here and ill e-mail you before i boar everyone to death |
Bigbob
| | Posted on Thursday, April 04, 2002 - 12:02 pm: |
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BUY a low cost directional ant.I did and solved my problem.MACO makes them and Signal engineering too.I got a pdl-2. |
Alsworld
| | Posted on Thursday, April 04, 2002 - 7:49 pm: |
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Bigbob, someday that will be in my future but not right now. The IMAX is only about 2 months old at best. Besides, my buddy I talk to is about 25 miles across town as the crow flies and this particular neighbor is right in between. I'd be pointing it right at his house. I will take a look though for sure. How do you like that pdl? |
Taz
| | Posted on Thursday, April 04, 2002 - 10:12 pm: |
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A BEAM IS DIFFERENT BIGBOB |
Taz
| | Posted on Friday, April 05, 2002 - 6:03 am: |
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the pdl is a perfect 2 element beam. excellent. with your imax and that kl350p in full way, the beam would give you the same results barefoot. |
Galileo
| | Posted on Friday, April 05, 2002 - 12:15 pm: |
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A ground rod over 8 feet will not radiate, a ground wire over 8 feet will....The rod is actually in the ground and will not tend to radiate...look at the radio and computer room ground setups, grids of cooper mesh some are quite large....Just my 2 cents worth |
Taz
| | Posted on Friday, April 05, 2002 - 6:09 pm: |
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I dont use anything over 8 feet. they say 10 feet but It can radiate with anything over 8 1/2 feet. I know and have tested it. you can use multiple 8 footers. nothing over 8 feet is worth it. it will radiate. bottom line. i know several hams who can back me up on it. |
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